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Linux/drivers/infiniband/hw/ehca/ehca_main.c

  1 /*
  2  *  IBM eServer eHCA Infiniband device driver for Linux on POWER
  3  *
  4  *  module start stop, hca detection
  5  *
  6  *  Authors: Heiko J Schick <schickhj@de.ibm.com>
  7  *           Hoang-Nam Nguyen <hnguyen@de.ibm.com>
  8  *           Joachim Fenkes <fenkes@de.ibm.com>
  9  *
 10  *  Copyright (c) 2005 IBM Corporation
 11  *
 12  *  All rights reserved.
 13  *
 14  *  This source code is distributed under a dual license of GPL v2.0 and OpenIB
 15  *  BSD.
 16  *
 17  * OpenIB BSD License
 18  *
 19  * Redistribution and use in source and binary forms, with or without
 20  * modification, are permitted provided that the following conditions are met:
 21  *
 22  * Redistributions of source code must retain the above copyright notice, this
 23  * list of conditions and the following disclaimer.
 24  *
 25  * Redistributions in binary form must reproduce the above copyright notice,
 26  * this list of conditions and the following disclaimer in the documentation
 27  * and/or other materials
 28  * provided with the distribution.
 29  *
 30  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 31  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 32  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 33  * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
 34  * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 35  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 36  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
 37  * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER
 38  * IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 39  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 40  * POSSIBILITY OF SUCH DAMAGE.
 41  */
 42 
 43 #ifdef CONFIG_PPC_64K_PAGES
 44 #include <linux/slab.h>
 45 #endif
 46 
 47 #include <linux/notifier.h>
 48 #include <linux/memory.h>
 49 #include <rdma/ib_mad.h>
 50 #include "ehca_classes.h"
 51 #include "ehca_iverbs.h"
 52 #include "ehca_mrmw.h"
 53 #include "ehca_tools.h"
 54 #include "hcp_if.h"
 55 
 56 #define HCAD_VERSION "0029"
 57 
 58 MODULE_LICENSE("Dual BSD/GPL");
 59 MODULE_AUTHOR("Christoph Raisch <raisch@de.ibm.com>");
 60 MODULE_DESCRIPTION("IBM eServer HCA InfiniBand Device Driver");
 61 MODULE_VERSION(HCAD_VERSION);
 62 
 63 static bool ehca_open_aqp1    = 0;
 64 static int ehca_hw_level      = 0;
 65 static bool ehca_poll_all_eqs = 1;
 66 
 67 int ehca_debug_level   = 0;
 68 int ehca_nr_ports      = -1;
 69 bool ehca_use_hp_mr    = 0;
 70 int ehca_port_act_time = 30;
 71 int ehca_static_rate   = -1;
 72 bool ehca_scaling_code = 0;
 73 int ehca_lock_hcalls   = -1;
 74 int ehca_max_cq        = -1;
 75 int ehca_max_qp        = -1;
 76 
 77 module_param_named(open_aqp1,     ehca_open_aqp1,     bool, S_IRUGO);
 78 module_param_named(debug_level,   ehca_debug_level,   int,  S_IRUGO);
 79 module_param_named(hw_level,      ehca_hw_level,      int,  S_IRUGO);
 80 module_param_named(nr_ports,      ehca_nr_ports,      int,  S_IRUGO);
 81 module_param_named(use_hp_mr,     ehca_use_hp_mr,     bool, S_IRUGO);
 82 module_param_named(port_act_time, ehca_port_act_time, int,  S_IRUGO);
 83 module_param_named(poll_all_eqs,  ehca_poll_all_eqs,  bool, S_IRUGO);
 84 module_param_named(static_rate,   ehca_static_rate,   int,  S_IRUGO);
 85 module_param_named(scaling_code,  ehca_scaling_code,  bool, S_IRUGO);
 86 module_param_named(lock_hcalls,   ehca_lock_hcalls,   bint, S_IRUGO);
 87 module_param_named(number_of_cqs, ehca_max_cq,        int,  S_IRUGO);
 88 module_param_named(number_of_qps, ehca_max_qp,        int,  S_IRUGO);
 89 
 90 MODULE_PARM_DESC(open_aqp1,
 91                  "Open AQP1 on startup (default: no)");
 92 MODULE_PARM_DESC(debug_level,
 93                  "Amount of debug output (0: none (default), 1: traces, "
 94                  "2: some dumps, 3: lots)");
 95 MODULE_PARM_DESC(hw_level,
 96                  "Hardware level (0: autosensing (default), "
 97                  "0x10..0x14: eHCA, 0x20..0x23: eHCA2)");
 98 MODULE_PARM_DESC(nr_ports,
 99                  "number of connected ports (-1: autodetect (default), "
100                  "1: port one only, 2: two ports)");
101 MODULE_PARM_DESC(use_hp_mr,
102                  "Use high performance MRs (default: no)");
103 MODULE_PARM_DESC(port_act_time,
104                  "Time to wait for port activation (default: 30 sec)");
105 MODULE_PARM_DESC(poll_all_eqs,
106                  "Poll all event queues periodically (default: yes)");
107 MODULE_PARM_DESC(static_rate,
108                  "Set permanent static rate (default: no static rate)");
109 MODULE_PARM_DESC(scaling_code,
110                  "Enable scaling code (default: no)");
111 MODULE_PARM_DESC(lock_hcalls,
112                  "Serialize all hCalls made by the driver "
113                  "(default: autodetect)");
114 MODULE_PARM_DESC(number_of_cqs,
115                 "Max number of CQs which can be allocated "
116                 "(default: autodetect)");
117 MODULE_PARM_DESC(number_of_qps,
118                 "Max number of QPs which can be allocated "
119                 "(default: autodetect)");
120 
121 DEFINE_RWLOCK(ehca_qp_idr_lock);
122 DEFINE_RWLOCK(ehca_cq_idr_lock);
123 DEFINE_IDR(ehca_qp_idr);
124 DEFINE_IDR(ehca_cq_idr);
125 
126 static LIST_HEAD(shca_list); /* list of all registered ehcas */
127 DEFINE_SPINLOCK(shca_list_lock);
128 
129 static struct timer_list poll_eqs_timer;
130 
131 #ifdef CONFIG_PPC_64K_PAGES
132 static struct kmem_cache *ctblk_cache;
133 
134 void *ehca_alloc_fw_ctrlblock(gfp_t flags)
135 {
136         void *ret = kmem_cache_zalloc(ctblk_cache, flags);
137         if (!ret)
138                 ehca_gen_err("Out of memory for ctblk");
139         return ret;
140 }
141 
142 void ehca_free_fw_ctrlblock(void *ptr)
143 {
144         if (ptr)
145                 kmem_cache_free(ctblk_cache, ptr);
146 
147 }
148 #endif
149 
150 int ehca2ib_return_code(u64 ehca_rc)
151 {
152         switch (ehca_rc) {
153         case H_SUCCESS:
154                 return 0;
155         case H_RESOURCE:             /* Resource in use */
156         case H_BUSY:
157                 return -EBUSY;
158         case H_NOT_ENOUGH_RESOURCES: /* insufficient resources */
159         case H_CONSTRAINED:          /* resource constraint */
160         case H_NO_MEM:
161                 return -ENOMEM;
162         default:
163                 return -EINVAL;
164         }
165 }
166 
167 static int ehca_create_slab_caches(void)
168 {
169         int ret;
170 
171         ret = ehca_init_pd_cache();
172         if (ret) {
173                 ehca_gen_err("Cannot create PD SLAB cache.");
174                 return ret;
175         }
176 
177         ret = ehca_init_cq_cache();
178         if (ret) {
179                 ehca_gen_err("Cannot create CQ SLAB cache.");
180                 goto create_slab_caches2;
181         }
182 
183         ret = ehca_init_qp_cache();
184         if (ret) {
185                 ehca_gen_err("Cannot create QP SLAB cache.");
186                 goto create_slab_caches3;
187         }
188 
189         ret = ehca_init_av_cache();
190         if (ret) {
191                 ehca_gen_err("Cannot create AV SLAB cache.");
192                 goto create_slab_caches4;
193         }
194 
195         ret = ehca_init_mrmw_cache();
196         if (ret) {
197                 ehca_gen_err("Cannot create MR&MW SLAB cache.");
198                 goto create_slab_caches5;
199         }
200 
201         ret = ehca_init_small_qp_cache();
202         if (ret) {
203                 ehca_gen_err("Cannot create small queue SLAB cache.");
204                 goto create_slab_caches6;
205         }
206 
207 #ifdef CONFIG_PPC_64K_PAGES
208         ctblk_cache = kmem_cache_create("ehca_cache_ctblk",
209                                         EHCA_PAGESIZE, H_CB_ALIGNMENT,
210                                         SLAB_HWCACHE_ALIGN,
211                                         NULL);
212         if (!ctblk_cache) {
213                 ehca_gen_err("Cannot create ctblk SLAB cache.");
214                 ehca_cleanup_small_qp_cache();
215                 ret = -ENOMEM;
216                 goto create_slab_caches6;
217         }
218 #endif
219         return 0;
220 
221 create_slab_caches6:
222         ehca_cleanup_mrmw_cache();
223 
224 create_slab_caches5:
225         ehca_cleanup_av_cache();
226 
227 create_slab_caches4:
228         ehca_cleanup_qp_cache();
229 
230 create_slab_caches3:
231         ehca_cleanup_cq_cache();
232 
233 create_slab_caches2:
234         ehca_cleanup_pd_cache();
235 
236         return ret;
237 }
238 
239 static void ehca_destroy_slab_caches(void)
240 {
241         ehca_cleanup_small_qp_cache();
242         ehca_cleanup_mrmw_cache();
243         ehca_cleanup_av_cache();
244         ehca_cleanup_qp_cache();
245         ehca_cleanup_cq_cache();
246         ehca_cleanup_pd_cache();
247 #ifdef CONFIG_PPC_64K_PAGES
248         if (ctblk_cache)
249                 kmem_cache_destroy(ctblk_cache);
250 #endif
251 }
252 
253 #define EHCA_HCAAVER  EHCA_BMASK_IBM(32, 39)
254 #define EHCA_REVID    EHCA_BMASK_IBM(40, 63)
255 
256 static struct cap_descr {
257         u64 mask;
258         char *descr;
259 } hca_cap_descr[] = {
260         { HCA_CAP_AH_PORT_NR_CHECK, "HCA_CAP_AH_PORT_NR_CHECK" },
261         { HCA_CAP_ATOMIC, "HCA_CAP_ATOMIC" },
262         { HCA_CAP_AUTO_PATH_MIG, "HCA_CAP_AUTO_PATH_MIG" },
263         { HCA_CAP_BAD_P_KEY_CTR, "HCA_CAP_BAD_P_KEY_CTR" },
264         { HCA_CAP_SQD_RTS_PORT_CHANGE, "HCA_CAP_SQD_RTS_PORT_CHANGE" },
265         { HCA_CAP_CUR_QP_STATE_MOD, "HCA_CAP_CUR_QP_STATE_MOD" },
266         { HCA_CAP_INIT_TYPE, "HCA_CAP_INIT_TYPE" },
267         { HCA_CAP_PORT_ACTIVE_EVENT, "HCA_CAP_PORT_ACTIVE_EVENT" },
268         { HCA_CAP_Q_KEY_VIOL_CTR, "HCA_CAP_Q_KEY_VIOL_CTR" },
269         { HCA_CAP_WQE_RESIZE, "HCA_CAP_WQE_RESIZE" },
270         { HCA_CAP_RAW_PACKET_MCAST, "HCA_CAP_RAW_PACKET_MCAST" },
271         { HCA_CAP_SHUTDOWN_PORT, "HCA_CAP_SHUTDOWN_PORT" },
272         { HCA_CAP_RC_LL_QP, "HCA_CAP_RC_LL_QP" },
273         { HCA_CAP_SRQ, "HCA_CAP_SRQ" },
274         { HCA_CAP_UD_LL_QP, "HCA_CAP_UD_LL_QP" },
275         { HCA_CAP_RESIZE_MR, "HCA_CAP_RESIZE_MR" },
276         { HCA_CAP_MINI_QP, "HCA_CAP_MINI_QP" },
277         { HCA_CAP_H_ALLOC_RES_SYNC, "HCA_CAP_H_ALLOC_RES_SYNC" },
278 };
279 
280 static int ehca_sense_attributes(struct ehca_shca *shca)
281 {
282         int i, ret = 0;
283         u64 h_ret;
284         struct hipz_query_hca *rblock;
285         struct hipz_query_port *port;
286         const char *loc_code;
287 
288         static const u32 pgsize_map[] = {
289                 HCA_CAP_MR_PGSIZE_4K,  0x1000,
290                 HCA_CAP_MR_PGSIZE_64K, 0x10000,
291                 HCA_CAP_MR_PGSIZE_1M,  0x100000,
292                 HCA_CAP_MR_PGSIZE_16M, 0x1000000,
293         };
294 
295         ehca_gen_dbg("Probing adapter %s...",
296                      shca->ofdev->dev.of_node->full_name);
297         loc_code = of_get_property(shca->ofdev->dev.of_node, "ibm,loc-code",
298                                    NULL);
299         if (loc_code)
300                 ehca_gen_dbg(" ... location lode=%s", loc_code);
301 
302         rblock = ehca_alloc_fw_ctrlblock(GFP_KERNEL);
303         if (!rblock) {
304                 ehca_gen_err("Cannot allocate rblock memory.");
305                 return -ENOMEM;
306         }
307 
308         h_ret = hipz_h_query_hca(shca->ipz_hca_handle, rblock);
309         if (h_ret != H_SUCCESS) {
310                 ehca_gen_err("Cannot query device properties. h_ret=%lli",
311                              h_ret);
312                 ret = -EPERM;
313                 goto sense_attributes1;
314         }
315 
316         if (ehca_nr_ports == 1)
317                 shca->num_ports = 1;
318         else
319                 shca->num_ports = (u8)rblock->num_ports;
320 
321         ehca_gen_dbg(" ... found %x ports", rblock->num_ports);
322 
323         if (ehca_hw_level == 0) {
324                 u32 hcaaver;
325                 u32 revid;
326 
327                 hcaaver = EHCA_BMASK_GET(EHCA_HCAAVER, rblock->hw_ver);
328                 revid   = EHCA_BMASK_GET(EHCA_REVID, rblock->hw_ver);
329 
330                 ehca_gen_dbg(" ... hardware version=%x:%x", hcaaver, revid);
331 
332                 if (hcaaver == 1) {
333                         if (revid <= 3)
334                                 shca->hw_level = 0x10 | (revid + 1);
335                         else
336                                 shca->hw_level = 0x14;
337                 } else if (hcaaver == 2) {
338                         if (revid == 0)
339                                 shca->hw_level = 0x21;
340                         else if (revid == 0x10)
341                                 shca->hw_level = 0x22;
342                         else if (revid == 0x20 || revid == 0x21)
343                                 shca->hw_level = 0x23;
344                 }
345 
346                 if (!shca->hw_level) {
347                         ehca_gen_warn("unknown hardware version"
348                                       " - assuming default level");
349                         shca->hw_level = 0x22;
350                 }
351         } else
352                 shca->hw_level = ehca_hw_level;
353         ehca_gen_dbg(" ... hardware level=%x", shca->hw_level);
354 
355         shca->hca_cap = rblock->hca_cap_indicators;
356         ehca_gen_dbg(" ... HCA capabilities:");
357         for (i = 0; i < ARRAY_SIZE(hca_cap_descr); i++)
358                 if (EHCA_BMASK_GET(hca_cap_descr[i].mask, shca->hca_cap))
359                         ehca_gen_dbg("   %s", hca_cap_descr[i].descr);
360 
361         /* Autodetect hCall locking -- the "H_ALLOC_RESOURCE synced" flag is
362          * a firmware property, so it's valid across all adapters
363          */
364         if (ehca_lock_hcalls == -1)
365                 ehca_lock_hcalls = !EHCA_BMASK_GET(HCA_CAP_H_ALLOC_RES_SYNC,
366                                         shca->hca_cap);
367 
368         /* translate supported MR page sizes; always support 4K */
369         shca->hca_cap_mr_pgsize = EHCA_PAGESIZE;
370         for (i = 0; i < ARRAY_SIZE(pgsize_map); i += 2)
371                 if (rblock->memory_page_size_supported & pgsize_map[i])
372                         shca->hca_cap_mr_pgsize |= pgsize_map[i + 1];
373 
374         /* Set maximum number of CQs and QPs to calculate EQ size */
375         if (shca->max_num_qps == -1)
376                 shca->max_num_qps = min_t(int, rblock->max_qp,
377                                           EHCA_MAX_NUM_QUEUES);
378         else if (shca->max_num_qps < 1 || shca->max_num_qps > rblock->max_qp) {
379                 ehca_gen_warn("The requested number of QPs is out of range "
380                               "(1 - %i) specified by HW. Value is set to %i",
381                               rblock->max_qp, rblock->max_qp);
382                 shca->max_num_qps = rblock->max_qp;
383         }
384 
385         if (shca->max_num_cqs == -1)
386                 shca->max_num_cqs = min_t(int, rblock->max_cq,
387                                           EHCA_MAX_NUM_QUEUES);
388         else if (shca->max_num_cqs < 1 || shca->max_num_cqs > rblock->max_cq) {
389                 ehca_gen_warn("The requested number of CQs is out of range "
390                               "(1 - %i) specified by HW. Value is set to %i",
391                               rblock->max_cq, rblock->max_cq);
392         }
393 
394         /* query max MTU from first port -- it's the same for all ports */
395         port = (struct hipz_query_port *)rblock;
396         h_ret = hipz_h_query_port(shca->ipz_hca_handle, 1, port);
397         if (h_ret != H_SUCCESS) {
398                 ehca_gen_err("Cannot query port properties. h_ret=%lli",
399                              h_ret);
400                 ret = -EPERM;
401                 goto sense_attributes1;
402         }
403 
404         shca->max_mtu = port->max_mtu;
405 
406 sense_attributes1:
407         ehca_free_fw_ctrlblock(rblock);
408         return ret;
409 }
410 
411 static int init_node_guid(struct ehca_shca *shca)
412 {
413         int ret = 0;
414         struct hipz_query_hca *rblock;
415 
416         rblock = ehca_alloc_fw_ctrlblock(GFP_KERNEL);
417         if (!rblock) {
418                 ehca_err(&shca->ib_device, "Can't allocate rblock memory.");
419                 return -ENOMEM;
420         }
421 
422         if (hipz_h_query_hca(shca->ipz_hca_handle, rblock) != H_SUCCESS) {
423                 ehca_err(&shca->ib_device, "Can't query device properties");
424                 ret = -EINVAL;
425                 goto init_node_guid1;
426         }
427 
428         memcpy(&shca->ib_device.node_guid, &rblock->node_guid, sizeof(u64));
429 
430 init_node_guid1:
431         ehca_free_fw_ctrlblock(rblock);
432         return ret;
433 }
434 
435 static int ehca_port_immutable(struct ib_device *ibdev, u8 port_num,
436                                struct ib_port_immutable *immutable)
437 {
438         struct ib_port_attr attr;
439         int err;
440 
441         err = ehca_query_port(ibdev, port_num, &attr);
442         if (err)
443                 return err;
444 
445         immutable->pkey_tbl_len = attr.pkey_tbl_len;
446         immutable->gid_tbl_len = attr.gid_tbl_len;
447         immutable->core_cap_flags = RDMA_CORE_PORT_IBA_IB;
448         immutable->max_mad_size = IB_MGMT_MAD_SIZE;
449 
450         return 0;
451 }
452 
453 static int ehca_init_device(struct ehca_shca *shca)
454 {
455         int ret;
456 
457         ret = init_node_guid(shca);
458         if (ret)
459                 return ret;
460 
461         strlcpy(shca->ib_device.name, "ehca%d", IB_DEVICE_NAME_MAX);
462         shca->ib_device.owner               = THIS_MODULE;
463 
464         shca->ib_device.uverbs_abi_ver      = 8;
465         shca->ib_device.uverbs_cmd_mask     =
466                 (1ull << IB_USER_VERBS_CMD_GET_CONTEXT)         |
467                 (1ull << IB_USER_VERBS_CMD_QUERY_DEVICE)        |
468                 (1ull << IB_USER_VERBS_CMD_QUERY_PORT)          |
469                 (1ull << IB_USER_VERBS_CMD_ALLOC_PD)            |
470                 (1ull << IB_USER_VERBS_CMD_DEALLOC_PD)          |
471                 (1ull << IB_USER_VERBS_CMD_REG_MR)              |
472                 (1ull << IB_USER_VERBS_CMD_DEREG_MR)            |
473                 (1ull << IB_USER_VERBS_CMD_CREATE_COMP_CHANNEL) |
474                 (1ull << IB_USER_VERBS_CMD_CREATE_CQ)           |
475                 (1ull << IB_USER_VERBS_CMD_DESTROY_CQ)          |
476                 (1ull << IB_USER_VERBS_CMD_CREATE_QP)           |
477                 (1ull << IB_USER_VERBS_CMD_MODIFY_QP)           |
478                 (1ull << IB_USER_VERBS_CMD_QUERY_QP)            |
479                 (1ull << IB_USER_VERBS_CMD_DESTROY_QP)          |
480                 (1ull << IB_USER_VERBS_CMD_ATTACH_MCAST)        |
481                 (1ull << IB_USER_VERBS_CMD_DETACH_MCAST);
482 
483         shca->ib_device.node_type           = RDMA_NODE_IB_CA;
484         shca->ib_device.phys_port_cnt       = shca->num_ports;
485         shca->ib_device.num_comp_vectors    = 1;
486         shca->ib_device.dma_device          = &shca->ofdev->dev;
487         shca->ib_device.query_device        = ehca_query_device;
488         shca->ib_device.query_port          = ehca_query_port;
489         shca->ib_device.query_gid           = ehca_query_gid;
490         shca->ib_device.query_pkey          = ehca_query_pkey;
491         /* shca->in_device.modify_device    = ehca_modify_device    */
492         shca->ib_device.modify_port         = ehca_modify_port;
493         shca->ib_device.alloc_ucontext      = ehca_alloc_ucontext;
494         shca->ib_device.dealloc_ucontext    = ehca_dealloc_ucontext;
495         shca->ib_device.alloc_pd            = ehca_alloc_pd;
496         shca->ib_device.dealloc_pd          = ehca_dealloc_pd;
497         shca->ib_device.create_ah           = ehca_create_ah;
498         /* shca->ib_device.modify_ah        = ehca_modify_ah;       */
499         shca->ib_device.query_ah            = ehca_query_ah;
500         shca->ib_device.destroy_ah          = ehca_destroy_ah;
501         shca->ib_device.create_qp           = ehca_create_qp;
502         shca->ib_device.modify_qp           = ehca_modify_qp;
503         shca->ib_device.query_qp            = ehca_query_qp;
504         shca->ib_device.destroy_qp          = ehca_destroy_qp;
505         shca->ib_device.post_send           = ehca_post_send;
506         shca->ib_device.post_recv           = ehca_post_recv;
507         shca->ib_device.create_cq           = ehca_create_cq;
508         shca->ib_device.destroy_cq          = ehca_destroy_cq;
509         shca->ib_device.resize_cq           = ehca_resize_cq;
510         shca->ib_device.poll_cq             = ehca_poll_cq;
511         /* shca->ib_device.peek_cq          = ehca_peek_cq;         */
512         shca->ib_device.req_notify_cq       = ehca_req_notify_cq;
513         /* shca->ib_device.req_ncomp_notif  = ehca_req_ncomp_notif; */
514         shca->ib_device.get_dma_mr          = ehca_get_dma_mr;
515         shca->ib_device.reg_phys_mr         = ehca_reg_phys_mr;
516         shca->ib_device.reg_user_mr         = ehca_reg_user_mr;
517         shca->ib_device.query_mr            = ehca_query_mr;
518         shca->ib_device.dereg_mr            = ehca_dereg_mr;
519         shca->ib_device.rereg_phys_mr       = ehca_rereg_phys_mr;
520         shca->ib_device.alloc_mw            = ehca_alloc_mw;
521         shca->ib_device.bind_mw             = ehca_bind_mw;
522         shca->ib_device.dealloc_mw          = ehca_dealloc_mw;
523         shca->ib_device.alloc_fmr           = ehca_alloc_fmr;
524         shca->ib_device.map_phys_fmr        = ehca_map_phys_fmr;
525         shca->ib_device.unmap_fmr           = ehca_unmap_fmr;
526         shca->ib_device.dealloc_fmr         = ehca_dealloc_fmr;
527         shca->ib_device.attach_mcast        = ehca_attach_mcast;
528         shca->ib_device.detach_mcast        = ehca_detach_mcast;
529         shca->ib_device.process_mad         = ehca_process_mad;
530         shca->ib_device.mmap                = ehca_mmap;
531         shca->ib_device.dma_ops             = &ehca_dma_mapping_ops;
532         shca->ib_device.get_port_immutable  = ehca_port_immutable;
533 
534         if (EHCA_BMASK_GET(HCA_CAP_SRQ, shca->hca_cap)) {
535                 shca->ib_device.uverbs_cmd_mask |=
536                         (1ull << IB_USER_VERBS_CMD_CREATE_SRQ) |
537                         (1ull << IB_USER_VERBS_CMD_MODIFY_SRQ) |
538                         (1ull << IB_USER_VERBS_CMD_QUERY_SRQ) |
539                         (1ull << IB_USER_VERBS_CMD_DESTROY_SRQ);
540 
541                 shca->ib_device.create_srq          = ehca_create_srq;
542                 shca->ib_device.modify_srq          = ehca_modify_srq;
543                 shca->ib_device.query_srq           = ehca_query_srq;
544                 shca->ib_device.destroy_srq         = ehca_destroy_srq;
545                 shca->ib_device.post_srq_recv       = ehca_post_srq_recv;
546         }
547 
548         return ret;
549 }
550 
551 static int ehca_create_aqp1(struct ehca_shca *shca, u32 port)
552 {
553         struct ehca_sport *sport = &shca->sport[port - 1];
554         struct ib_cq *ibcq;
555         struct ib_qp *ibqp;
556         struct ib_qp_init_attr qp_init_attr;
557         struct ib_cq_init_attr cq_attr = {};
558         int ret;
559 
560         if (sport->ibcq_aqp1) {
561                 ehca_err(&shca->ib_device, "AQP1 CQ is already created.");
562                 return -EPERM;
563         }
564 
565         cq_attr.cqe = 10;
566         ibcq = ib_create_cq(&shca->ib_device, NULL, NULL, (void *)(-1),
567                             &cq_attr);
568         if (IS_ERR(ibcq)) {
569                 ehca_err(&shca->ib_device, "Cannot create AQP1 CQ.");
570                 return PTR_ERR(ibcq);
571         }
572         sport->ibcq_aqp1 = ibcq;
573 
574         if (sport->ibqp_sqp[IB_QPT_GSI]) {
575                 ehca_err(&shca->ib_device, "AQP1 QP is already created.");
576                 ret = -EPERM;
577                 goto create_aqp1;
578         }
579 
580         memset(&qp_init_attr, 0, sizeof(struct ib_qp_init_attr));
581         qp_init_attr.send_cq          = ibcq;
582         qp_init_attr.recv_cq          = ibcq;
583         qp_init_attr.sq_sig_type      = IB_SIGNAL_ALL_WR;
584         qp_init_attr.cap.max_send_wr  = 100;
585         qp_init_attr.cap.max_recv_wr  = 100;
586         qp_init_attr.cap.max_send_sge = 2;
587         qp_init_attr.cap.max_recv_sge = 1;
588         qp_init_attr.qp_type          = IB_QPT_GSI;
589         qp_init_attr.port_num         = port;
590         qp_init_attr.qp_context       = NULL;
591         qp_init_attr.event_handler    = NULL;
592         qp_init_attr.srq              = NULL;
593 
594         ibqp = ib_create_qp(&shca->pd->ib_pd, &qp_init_attr);
595         if (IS_ERR(ibqp)) {
596                 ehca_err(&shca->ib_device, "Cannot create AQP1 QP.");
597                 ret = PTR_ERR(ibqp);
598                 goto create_aqp1;
599         }
600         sport->ibqp_sqp[IB_QPT_GSI] = ibqp;
601 
602         return 0;
603 
604 create_aqp1:
605         ib_destroy_cq(sport->ibcq_aqp1);
606         return ret;
607 }
608 
609 static int ehca_destroy_aqp1(struct ehca_sport *sport)
610 {
611         int ret;
612 
613         ret = ib_destroy_qp(sport->ibqp_sqp[IB_QPT_GSI]);
614         if (ret) {
615                 ehca_gen_err("Cannot destroy AQP1 QP. ret=%i", ret);
616                 return ret;
617         }
618 
619         ret = ib_destroy_cq(sport->ibcq_aqp1);
620         if (ret)
621                 ehca_gen_err("Cannot destroy AQP1 CQ. ret=%i", ret);
622 
623         return ret;
624 }
625 
626 static ssize_t ehca_show_debug_level(struct device_driver *ddp, char *buf)
627 {
628         return snprintf(buf, PAGE_SIZE, "%d\n", ehca_debug_level);
629 }
630 
631 static ssize_t ehca_store_debug_level(struct device_driver *ddp,
632                                       const char *buf, size_t count)
633 {
634         int value = (*buf) - '';
635         if (value >= 0 && value <= 9)
636                 ehca_debug_level = value;
637         return 1;
638 }
639 
640 static DRIVER_ATTR(debug_level, S_IRUSR | S_IWUSR,
641                    ehca_show_debug_level, ehca_store_debug_level);
642 
643 static struct attribute *ehca_drv_attrs[] = {
644         &driver_attr_debug_level.attr,
645         NULL
646 };
647 
648 static struct attribute_group ehca_drv_attr_grp = {
649         .attrs = ehca_drv_attrs
650 };
651 
652 static const struct attribute_group *ehca_drv_attr_groups[] = {
653         &ehca_drv_attr_grp,
654         NULL,
655 };
656 
657 #define EHCA_RESOURCE_ATTR(name)                                           \
658 static ssize_t  ehca_show_##name(struct device *dev,                       \
659                                  struct device_attribute *attr,            \
660                                  char *buf)                                \
661 {                                                                          \
662         struct ehca_shca *shca;                                            \
663         struct hipz_query_hca *rblock;                                     \
664         int data;                                                          \
665                                                                            \
666         shca = dev_get_drvdata(dev);                                       \
667                                                                            \
668         rblock = ehca_alloc_fw_ctrlblock(GFP_KERNEL);                      \
669         if (!rblock) {                                                     \
670                 dev_err(dev, "Can't allocate rblock memory.\n");           \
671                 return 0;                                                  \
672         }                                                                  \
673                                                                            \
674         if (hipz_h_query_hca(shca->ipz_hca_handle, rblock) != H_SUCCESS) { \
675                 dev_err(dev, "Can't query device properties\n");           \
676                 ehca_free_fw_ctrlblock(rblock);                            \
677                 return 0;                                                  \
678         }                                                                  \
679                                                                            \
680         data = rblock->name;                                               \
681         ehca_free_fw_ctrlblock(rblock);                                    \
682                                                                            \
683         if ((strcmp(#name, "num_ports") == 0) && (ehca_nr_ports == 1))     \
684                 return snprintf(buf, 256, "1\n");                          \
685         else                                                               \
686                 return snprintf(buf, 256, "%d\n", data);                   \
687                                                                            \
688 }                                                                          \
689 static DEVICE_ATTR(name, S_IRUGO, ehca_show_##name, NULL);
690 
691 EHCA_RESOURCE_ATTR(num_ports);
692 EHCA_RESOURCE_ATTR(hw_ver);
693 EHCA_RESOURCE_ATTR(max_eq);
694 EHCA_RESOURCE_ATTR(cur_eq);
695 EHCA_RESOURCE_ATTR(max_cq);
696 EHCA_RESOURCE_ATTR(cur_cq);
697 EHCA_RESOURCE_ATTR(max_qp);
698 EHCA_RESOURCE_ATTR(cur_qp);
699 EHCA_RESOURCE_ATTR(max_mr);
700 EHCA_RESOURCE_ATTR(cur_mr);
701 EHCA_RESOURCE_ATTR(max_mw);
702 EHCA_RESOURCE_ATTR(cur_mw);
703 EHCA_RESOURCE_ATTR(max_pd);
704 EHCA_RESOURCE_ATTR(max_ah);
705 
706 static ssize_t ehca_show_adapter_handle(struct device *dev,
707                                         struct device_attribute *attr,
708                                         char *buf)
709 {
710         struct ehca_shca *shca = dev_get_drvdata(dev);
711 
712         return sprintf(buf, "%llx\n", shca->ipz_hca_handle.handle);
713 
714 }
715 static DEVICE_ATTR(adapter_handle, S_IRUGO, ehca_show_adapter_handle, NULL);
716 
717 static struct attribute *ehca_dev_attrs[] = {
718         &dev_attr_adapter_handle.attr,
719         &dev_attr_num_ports.attr,
720         &dev_attr_hw_ver.attr,
721         &dev_attr_max_eq.attr,
722         &dev_attr_cur_eq.attr,
723         &dev_attr_max_cq.attr,
724         &dev_attr_cur_cq.attr,
725         &dev_attr_max_qp.attr,
726         &dev_attr_cur_qp.attr,
727         &dev_attr_max_mr.attr,
728         &dev_attr_cur_mr.attr,
729         &dev_attr_max_mw.attr,
730         &dev_attr_cur_mw.attr,
731         &dev_attr_max_pd.attr,
732         &dev_attr_max_ah.attr,
733         NULL
734 };
735 
736 static struct attribute_group ehca_dev_attr_grp = {
737         .attrs = ehca_dev_attrs
738 };
739 
740 static int ehca_probe(struct platform_device *dev)
741 {
742         struct ehca_shca *shca;
743         const u64 *handle;
744         struct ib_pd *ibpd;
745         int ret, i, eq_size;
746         unsigned long flags;
747 
748         handle = of_get_property(dev->dev.of_node, "ibm,hca-handle", NULL);
749         if (!handle) {
750                 ehca_gen_err("Cannot get eHCA handle for adapter: %s.",
751                              dev->dev.of_node->full_name);
752                 return -ENODEV;
753         }
754 
755         if (!(*handle)) {
756                 ehca_gen_err("Wrong eHCA handle for adapter: %s.",
757                              dev->dev.of_node->full_name);
758                 return -ENODEV;
759         }
760 
761         shca = (struct ehca_shca *)ib_alloc_device(sizeof(*shca));
762         if (!shca) {
763                 ehca_gen_err("Cannot allocate shca memory.");
764                 return -ENOMEM;
765         }
766 
767         mutex_init(&shca->modify_mutex);
768         atomic_set(&shca->num_cqs, 0);
769         atomic_set(&shca->num_qps, 0);
770         shca->max_num_qps = ehca_max_qp;
771         shca->max_num_cqs = ehca_max_cq;
772 
773         for (i = 0; i < ARRAY_SIZE(shca->sport); i++)
774                 spin_lock_init(&shca->sport[i].mod_sqp_lock);
775 
776         shca->ofdev = dev;
777         shca->ipz_hca_handle.handle = *handle;
778         dev_set_drvdata(&dev->dev, shca);
779 
780         ret = ehca_sense_attributes(shca);
781         if (ret < 0) {
782                 ehca_gen_err("Cannot sense eHCA attributes.");
783                 goto probe1;
784         }
785 
786         ret = ehca_init_device(shca);
787         if (ret) {
788                 ehca_gen_err("Cannot init ehca  device struct");
789                 goto probe1;
790         }
791 
792         eq_size = 2 * shca->max_num_cqs + 4 * shca->max_num_qps;
793         /* create event queues */
794         ret = ehca_create_eq(shca, &shca->eq, EHCA_EQ, eq_size);
795         if (ret) {
796                 ehca_err(&shca->ib_device, "Cannot create EQ.");
797                 goto probe1;
798         }
799 
800         ret = ehca_create_eq(shca, &shca->neq, EHCA_NEQ, 513);
801         if (ret) {
802                 ehca_err(&shca->ib_device, "Cannot create NEQ.");
803                 goto probe3;
804         }
805 
806         /* create internal protection domain */
807         ibpd = ehca_alloc_pd(&shca->ib_device, (void *)(-1), NULL);
808         if (IS_ERR(ibpd)) {
809                 ehca_err(&shca->ib_device, "Cannot create internal PD.");
810                 ret = PTR_ERR(ibpd);
811                 goto probe4;
812         }
813 
814         shca->pd = container_of(ibpd, struct ehca_pd, ib_pd);
815         shca->pd->ib_pd.device = &shca->ib_device;
816 
817         /* create internal max MR */
818         ret = ehca_reg_internal_maxmr(shca, shca->pd, &shca->maxmr);
819 
820         if (ret) {
821                 ehca_err(&shca->ib_device, "Cannot create internal MR ret=%i",
822                          ret);
823                 goto probe5;
824         }
825 
826         ret = ib_register_device(&shca->ib_device, NULL);
827         if (ret) {
828                 ehca_err(&shca->ib_device,
829                          "ib_register_device() failed ret=%i", ret);
830                 goto probe6;
831         }
832 
833         /* create AQP1 for port 1 */
834         if (ehca_open_aqp1 == 1) {
835                 shca->sport[0].port_state = IB_PORT_DOWN;
836                 ret = ehca_create_aqp1(shca, 1);
837                 if (ret) {
838                         ehca_err(&shca->ib_device,
839                                  "Cannot create AQP1 for port 1.");
840                         goto probe7;
841                 }
842         }
843 
844         /* create AQP1 for port 2 */
845         if ((ehca_open_aqp1 == 1) && (shca->num_ports == 2)) {
846                 shca->sport[1].port_state = IB_PORT_DOWN;
847                 ret = ehca_create_aqp1(shca, 2);
848                 if (ret) {
849                         ehca_err(&shca->ib_device,
850                                  "Cannot create AQP1 for port 2.");
851                         goto probe8;
852                 }
853         }
854 
855         ret = sysfs_create_group(&dev->dev.kobj, &ehca_dev_attr_grp);
856         if (ret) /* only complain; we can live without attributes */
857                 ehca_err(&shca->ib_device,
858                          "Cannot create device attributes  ret=%d", ret);
859 
860         spin_lock_irqsave(&shca_list_lock, flags);
861         list_add(&shca->shca_list, &shca_list);
862         spin_unlock_irqrestore(&shca_list_lock, flags);
863 
864         return 0;
865 
866 probe8:
867         ret = ehca_destroy_aqp1(&shca->sport[0]);
868         if (ret)
869                 ehca_err(&shca->ib_device,
870                          "Cannot destroy AQP1 for port 1. ret=%i", ret);
871 
872 probe7:
873         ib_unregister_device(&shca->ib_device);
874 
875 probe6:
876         ret = ehca_dereg_internal_maxmr(shca);
877         if (ret)
878                 ehca_err(&shca->ib_device,
879                          "Cannot destroy internal MR. ret=%x", ret);
880 
881 probe5:
882         ret = ehca_dealloc_pd(&shca->pd->ib_pd);
883         if (ret)
884                 ehca_err(&shca->ib_device,
885                          "Cannot destroy internal PD. ret=%x", ret);
886 
887 probe4:
888         ret = ehca_destroy_eq(shca, &shca->neq);
889         if (ret)
890                 ehca_err(&shca->ib_device,
891                          "Cannot destroy NEQ. ret=%x", ret);
892 
893 probe3:
894         ret = ehca_destroy_eq(shca, &shca->eq);
895         if (ret)
896                 ehca_err(&shca->ib_device,
897                          "Cannot destroy EQ. ret=%x", ret);
898 
899 probe1:
900         ib_dealloc_device(&shca->ib_device);
901 
902         return -EINVAL;
903 }
904 
905 static int ehca_remove(struct platform_device *dev)
906 {
907         struct ehca_shca *shca = dev_get_drvdata(&dev->dev);
908         unsigned long flags;
909         int ret;
910 
911         sysfs_remove_group(&dev->dev.kobj, &ehca_dev_attr_grp);
912 
913         if (ehca_open_aqp1 == 1) {
914                 int i;
915                 for (i = 0; i < shca->num_ports; i++) {
916                         ret = ehca_destroy_aqp1(&shca->sport[i]);
917                         if (ret)
918                                 ehca_err(&shca->ib_device,
919                                          "Cannot destroy AQP1 for port %x "
920                                          "ret=%i", ret, i);
921                 }
922         }
923 
924         ib_unregister_device(&shca->ib_device);
925 
926         ret = ehca_dereg_internal_maxmr(shca);
927         if (ret)
928                 ehca_err(&shca->ib_device,
929                          "Cannot destroy internal MR. ret=%i", ret);
930 
931         ret = ehca_dealloc_pd(&shca->pd->ib_pd);
932         if (ret)
933                 ehca_err(&shca->ib_device,
934                          "Cannot destroy internal PD. ret=%i", ret);
935 
936         ret = ehca_destroy_eq(shca, &shca->eq);
937         if (ret)
938                 ehca_err(&shca->ib_device, "Cannot destroy EQ. ret=%i", ret);
939 
940         ret = ehca_destroy_eq(shca, &shca->neq);
941         if (ret)
942                 ehca_err(&shca->ib_device, "Canot destroy NEQ. ret=%i", ret);
943 
944         ib_dealloc_device(&shca->ib_device);
945 
946         spin_lock_irqsave(&shca_list_lock, flags);
947         list_del(&shca->shca_list);
948         spin_unlock_irqrestore(&shca_list_lock, flags);
949 
950         return ret;
951 }
952 
953 static struct of_device_id ehca_device_table[] =
954 {
955         {
956                 .name       = "lhca",
957                 .compatible = "IBM,lhca",
958         },
959         {},
960 };
961 MODULE_DEVICE_TABLE(of, ehca_device_table);
962 
963 static struct platform_driver ehca_driver = {
964         .probe       = ehca_probe,
965         .remove      = ehca_remove,
966         .driver = {
967                 .name = "ehca",
968                 .owner = THIS_MODULE,
969                 .groups = ehca_drv_attr_groups,
970                 .of_match_table = ehca_device_table,
971         },
972 };
973 
974 void ehca_poll_eqs(unsigned long data)
975 {
976         struct ehca_shca *shca;
977 
978         spin_lock(&shca_list_lock);
979         list_for_each_entry(shca, &shca_list, shca_list) {
980                 if (shca->eq.is_initialized) {
981                         /* call deadman proc only if eq ptr does not change */
982                         struct ehca_eq *eq = &shca->eq;
983                         int max = 3;
984                         volatile u64 q_ofs, q_ofs2;
985                         unsigned long flags;
986                         spin_lock_irqsave(&eq->spinlock, flags);
987                         q_ofs = eq->ipz_queue.current_q_offset;
988                         spin_unlock_irqrestore(&eq->spinlock, flags);
989                         do {
990                                 spin_lock_irqsave(&eq->spinlock, flags);
991                                 q_ofs2 = eq->ipz_queue.current_q_offset;
992                                 spin_unlock_irqrestore(&eq->spinlock, flags);
993                                 max--;
994                         } while (q_ofs == q_ofs2 && max > 0);
995                         if (q_ofs == q_ofs2)
996                                 ehca_process_eq(shca, 0);
997                 }
998         }
999         mod_timer(&poll_eqs_timer, round_jiffies(jiffies + HZ));
1000         spin_unlock(&shca_list_lock);
1001 }
1002 
1003 static int ehca_mem_notifier(struct notifier_block *nb,
1004                              unsigned long action, void *data)
1005 {
1006         static unsigned long ehca_dmem_warn_time;
1007         unsigned long flags;
1008 
1009         switch (action) {
1010         case MEM_CANCEL_OFFLINE:
1011         case MEM_CANCEL_ONLINE:
1012         case MEM_ONLINE:
1013         case MEM_OFFLINE:
1014                 return NOTIFY_OK;
1015         case MEM_GOING_ONLINE:
1016         case MEM_GOING_OFFLINE:
1017                 /* only ok if no hca is attached to the lpar */
1018                 spin_lock_irqsave(&shca_list_lock, flags);
1019                 if (list_empty(&shca_list)) {
1020                         spin_unlock_irqrestore(&shca_list_lock, flags);
1021                         return NOTIFY_OK;
1022                 } else {
1023                         spin_unlock_irqrestore(&shca_list_lock, flags);
1024                         if (printk_timed_ratelimit(&ehca_dmem_warn_time,
1025                                                    30 * 1000))
1026                                 ehca_gen_err("DMEM operations are not allowed"
1027                                              "in conjunction with eHCA");
1028                         return NOTIFY_BAD;
1029                 }
1030         }
1031         return NOTIFY_OK;
1032 }
1033 
1034 static struct notifier_block ehca_mem_nb = {
1035         .notifier_call = ehca_mem_notifier,
1036 };
1037 
1038 static int __init ehca_module_init(void)
1039 {
1040         int ret;
1041 
1042         printk(KERN_INFO "eHCA Infiniband Device Driver "
1043                "(Version " HCAD_VERSION ")\n");
1044 
1045         ret = ehca_create_comp_pool();
1046         if (ret) {
1047                 ehca_gen_err("Cannot create comp pool.");
1048                 return ret;
1049         }
1050 
1051         ret = ehca_create_slab_caches();
1052         if (ret) {
1053                 ehca_gen_err("Cannot create SLAB caches");
1054                 ret = -ENOMEM;
1055                 goto module_init1;
1056         }
1057 
1058         ret = ehca_create_busmap();
1059         if (ret) {
1060                 ehca_gen_err("Cannot create busmap.");
1061                 goto module_init2;
1062         }
1063 
1064         ret = ibmebus_register_driver(&ehca_driver);
1065         if (ret) {
1066                 ehca_gen_err("Cannot register eHCA device driver");
1067                 ret = -EINVAL;
1068                 goto module_init3;
1069         }
1070 
1071         ret = register_memory_notifier(&ehca_mem_nb);
1072         if (ret) {
1073                 ehca_gen_err("Failed registering memory add/remove notifier");
1074                 goto module_init4;
1075         }
1076 
1077         if (ehca_poll_all_eqs != 1) {
1078                 ehca_gen_err("WARNING!!!");
1079                 ehca_gen_err("It is possible to lose interrupts.");
1080         } else {
1081                 init_timer(&poll_eqs_timer);
1082                 poll_eqs_timer.function = ehca_poll_eqs;
1083                 poll_eqs_timer.expires = jiffies + HZ;
1084                 add_timer(&poll_eqs_timer);
1085         }
1086 
1087         return 0;
1088 
1089 module_init4:
1090         ibmebus_unregister_driver(&ehca_driver);
1091 
1092 module_init3:
1093         ehca_destroy_busmap();
1094 
1095 module_init2:
1096         ehca_destroy_slab_caches();
1097 
1098 module_init1:
1099         ehca_destroy_comp_pool();
1100         return ret;
1101 };
1102 
1103 static void __exit ehca_module_exit(void)
1104 {
1105         if (ehca_poll_all_eqs == 1)
1106                 del_timer_sync(&poll_eqs_timer);
1107 
1108         ibmebus_unregister_driver(&ehca_driver);
1109 
1110         unregister_memory_notifier(&ehca_mem_nb);
1111 
1112         ehca_destroy_busmap();
1113 
1114         ehca_destroy_slab_caches();
1115 
1116         ehca_destroy_comp_pool();
1117 
1118         idr_destroy(&ehca_cq_idr);
1119         idr_destroy(&ehca_qp_idr);
1120 };
1121 
1122 module_init(ehca_module_init);
1123 module_exit(ehca_module_exit);
1124 

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